If you define "success" by what we see in the movies and on television, your model probably includes lots of cash, mansions, expensive cars, and gorgeous men and women. A great fantasy, but not the model we'll be discussing here. Sorry.
(PU) Personal Use
Personal Use licenses can only be used for personal affairs, such as reading, sharing (only if stated), teaching. Products with PU cannot in anyway be resold or changed as this license restricts such acts. With personal use licenses you may make a unlimited amounts of backup copies. In most cases unless stated within the license itself or within the product, it cannot be distributed.
(GAR) Give Away Rights
Give Away Rights is basically all digital products that have the rights to share, distribute across the internet give away to your subscribers on mailing list and basically anyone whois wanting a free product, you may give away freely. These products might even come with sale rights but it is not necessary to sell these products if you are just wanting to give them away for free.